Finding the Fourth Proportional to 2,531.72, 3,797.42 and 865.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,531.72 : 3,797.42 = 865.69 : x
2. Step 2: Convert to fraction form
   2,531.72/3,797.42 = 865.69/x
3. Step 3: Cross multiply
   2,531.72x = 3,797.42 × 865.69
4. Step 4: Simplify right side
   2,531.72x = 3,287,374.70
5. Step 5: Solve for x
   x = 3,287,374.70/2,531.72
6. Step 6: Final answer
   x = 1,298.47